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 * for the specific language governing rights and limitations under the
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 * The Original Code is Bespin.
 *
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var t = require("plugindev");
var DummyFileSource = require("filesystem:tests/fixture").DummyFileSource;
var fs = require("filesystem");
var TextStorage = require("text_editor:models/textstorage").TextStorage;
var editsession = require("edit_session");
var Promise = require("bespin:promise").Promise;

var source = DummyFileSource.create({
    files: [
        {name: "atTheTop.js", contents: "the top file"},
        {name: "anotherAtTheTop.js", contents: "another file"},
        {name: "foo/"},
        {name: "deeply/nested/directory/andAFile.txt", contents: "text file"}
    ]
});

exports.testBufferFileChange = function() {
    var root = fs.Filesystem.create({
        source: source
    });
    var buffer = editsession.Buffer.create();
    t.ok(buffer.get("model") != null, 
        "Model should be set to a TextStorage by default");
    t.ok(buffer.untitled(), "Buffer should initially be untitled");
    var f = root.getFile("atTheTop.js");
    buffer.changeFileOnly(f);
    t.ok(!buffer.untitled(), "Buffer should no longer be untitled");
    t.equal("", buffer.get("model").get("value"), "Should be empty now");
    buffer.changeFileOnly(null);
    t.ok(buffer.untitled(), "Buffer should be untitled again");
    buffer.set("file", f);
    var pr = new Promise();
    setTimeout(function() {
        var newtext = buffer.get("model").get("value");
        t.equal(newtext, "the top file", "Expected file contents to be loaded");
        
        // now we want to reset the buffer.
        buffer.changeFile(null);
        t.ok(buffer.untitled(), "Buffer should be untitled again");
        newtext = buffer.get("model").get("value");
        t.equal(newtext, "", "editor text should be empty");
        pr.resolve();
    }, 1);
    return pr;
};

exports.testBufferFileChangeWithCallback = function() {
    var root = fs.Filesystem.create({
        source: source
    });
    var buffer = editsession.Buffer.create();
    var f = root.getFile("atTheTop.js");
    var pr = buffer.changeFile(f);
    var testpr = pr.then(function(b) {
        t.equal(b, buffer, "should have gotten the buffer object in");
        t.equal(b.get("model").get("value"), "the top file", "contents should be loaded");
        if (testpr != undefined) {
            testpr.resolve();
        }
    });
    return testpr;
};

exports.testBufferSaving = function() {
    source.reset();
    var testpr = new Promise();
    var root = fs.Filesystem.create({ source: source });
    var buffer = editsession.Buffer.create();
    buffer.setPath('model.value', "foobar");
    t.equal(buffer.getPath('model.value'), "foobar", "the value stored in " +
        "the model and the string that was just written to it");

    var file1 = root.getFile("bar.txt");
    file1.exists().then(function(exists) {
        t.ok(!exists, "file should not be there now");
        buffer.saveAs(file1).then(function() { 
            var request = source.requests.pop();
            t.equal(request[0], "saveContents");
            t.equal(request[1][0], "bar.txt");
            t.equal(request[1][1], "foobar");

            file1.exists().then(function(exists) {
                t.ok(exists, "file should now exist");
                testpr.resolve();
            });
        });
    });
    
    return testpr;
};
